Abstract
A retrospective review of a matched series of 40 Charnley and 40 T-28 total hip arthroplasties was performed. The mean follow-up period after surgery was 5 1/2 years. The clinical status and detailed radiographic appearance were carefully evaluated prior to operation, two months after operation, and at the final follow-up examination. The clinical results were similar. The Charnley femoral components tended to be positioned in a more valgus orientation than the T-28 prostheses by 2.2 degrees (p less than 0.02). After operation, the patients with T-28 prostheses had larger leg-length discrepancies than the patients with Charnley prostheses (p less than 0.01). Calcar resorption was not significantly different between the two groups, nor were subsidence of the femoral components and migration of the acetabular components. A collared T-28 femoral component has little clinical advantage over a noncollared prosthesis with respect to calcar resorption and femoral component subsidence.
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